a third of the new jobs here in the u.s. economists told me there's only so far you can push the work force, making their work harder, longer hours, to make the companies leaner and meaner. they said eventually, to keep these profits up over the long haul, they're going to have to spend all the billions in profits on the sidelines in hiring new workers. >> right now, productivity is keeping it going. >> reporter: it is. all-time high. >> all right, thank you, david. >>> and we turn now to afghanistan, because there was tough news out of afghanistan tonight. three more american troops have died in the past 24 hours, bringing the total in july to 66. and that is the highest of any month since the war began almost nine years ago. afghanistan was one of the topics house speaker nancy pelosi tackled in a wide-ranging interview with abc's christiane amanpour, who makes her debut as host of "this week" on sunday. welcome aboard. tell us what the speaker said. >> reporter: well, diane, thank you very much indeed. and we did speak a